The problem

 
Why Safari does not have a preference for opening a new window in a tab makes no sense to me. 95% of the time web designers should open links in the same window but every now and again it makes sense to open a link in a new tab. One example is if you have a “how to” page. It’s good to have both pages open at the same time (the page you are trying to understand and the “how to” page telling you what to do).

The solution

 
1. Close “Safari”

2. Open “Terminal”



3. Paste in “defaults write com.apple.Safari TargetedClicksCreateTabs -bool true” and press “return” on your key pad.



4. Open Safari back up, your done!